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add detection of xsave

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The XSAVE cpuid flag determines if the processor supports the XSAVE
instructions(`xsave`, `xrestor`, `xsetbv`, `xgetbv`).

The OSXSAVE cpuid flag determines if the _operating system_ has XSAVE
**enabled**. Userland code has to use OSXSAVE for features such as AVX
and AVX512 but it still matters to know if the processor itself supports
it but not the operating system such as some virtual-machine contexts.
This commit is contained in:
Wunkolo 2023-03-22 12:54:30 -07:00
parent 740dff2e86
commit d700f6c357
2 changed files with 4 additions and 1 deletions
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3
sample/test_util.cpp
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@ -36,7 +36,8 @@ void putCPUinfo(bool onlyCpuidFeature)
{ Cpu::tE3DN, "e3dn" },
{ Cpu::tAESNI, "aesni" },
{ Cpu::tRDTSCP, "rdtscp" },
{ Cpu::tOSXSAVE, "osxsave(xgetvb)" },
{ Cpu::tXSAVE, "xsave(xgetvb)" },
{ Cpu::tOSXSAVE, "osxsave" },
{ Cpu::tPCLMULQDQ, "pclmulqdq" },
{ Cpu::tAVX, "avx" },
{ Cpu::tFMA, "fma" },

2
xbyak/xbyak_util.h
View file

@ -458,6 +458,7 @@ public:
XBYAK_DEFINE_TYPE(74, tPREFETCHITI);
XBYAK_DEFINE_TYPE(75, tSERIALIZE);
XBYAK_DEFINE_TYPE(76, tUINTR);
XBYAK_DEFINE_TYPE(77, tXSAVE);
#undef XBYAK_SPLIT_ID
#undef XBYAK_DEFINE_TYPE
@ -526,6 +527,7 @@ public:
if (ECX & (1U << 23)) type_ |= tPOPCNT;
if (ECX & (1U << 25)) type_ |= tAESNI;
if (ECX & (1U << 1)) type_ |= tPCLMULQDQ;
if (ECX & (1U << 26)) type_ |= tXSAVE;
if (ECX & (1U << 27)) type_ |= tOSXSAVE;
if (ECX & (1U << 30)) type_ |= tRDRAND;
if (ECX & (1U << 29)) type_ |= tF16C;